APA

Estados Unidos, Estados Unidos & Mozambique. (1980). Agricultural commodities. [Washington: Government Printing Office.

Chicago

Estados Unidos, Estados Unidos and Mozambique. 1980. Agricultural commodities. [Washington: Government Printing Office.

Harvard

Estados Unidos, Estados Unidos and Mozambique. (1980). Agricultural commodities. [Washington: Government Printing Office.

MLA

Estados Unidos, Estados Unidos and Mozambique. Agricultural commodities. [Washington: Government Printing Office. 1980.